This past April was an exciting month for green design - from the <a href="https://inhabitat.com/milan-furniture-fair">Milan Furniture Fair</a> to Spain's amazing new <a href="https://inhabitat.com/metropol-parasol-the-worlds-largest-wooden-structure-opens-in-seville/">Metropol Parasol</a> to an incredibly <a href="https://inhabitat.com/amazingly-patient-artist-uses-100000-toothpicks-to-create-incredible-sculpture-of-san-francisco/">intricate sculpture of San Francisco</a> built from 100,000 toothpicks! if you missed out on these inspiring stories, don't fret - we've rounded up our top seven green <a href="https://inhabitat.com/metropol-parasol-the-worlds-largest-wooden-structure-opens-in-seville/">architecture</a>, <a href="https://inhabitat.com/researchers-develop-a-heat-pump-that-can-last-10000-years/">technology</a>, <a href="https://inhabitat.com/amazingly-patient-artist-uses-100000-toothpicks-to-create-incredible-sculpture-of-san-francisco/">art</a>, <a href="https://inhabitat.com/365-knitting-clock-tells-the-time-by-spotted-at-milan-salone-satellite/">interiors</a>, <a href="https://inhabitat.com/ockels-23-passenger-ev-superbus-can-hit-155-mph/">transportation</a>, <a href="https://inhabitat.com/the-best-sustainable-designs-from-salone-satellite-2011-in-milan/">international</a> and<a href="https://inhabitat.com/nyc/brooklyn-grange-worlds-largest-rooftop-farm-kicks-off-second-growing-season/"> local </a>Inhabitat stories from April. Hit the jump to check them out!

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<h3><strong><a href="https://inhabitat.com/metropol-parasol-the-worlds-largest-wooden-structure-opens-in-seville/">ARCHITECTURE: The World’s Largest Wooden Structure Opens in Seville</a></strong></h3>
The Metropol Parasol opens to the public in Seville, Spain. Designed by Jurgen Mayer H. Architects, it is the world's largest wooden structure.

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<h3><strong><a href="https://inhabitat.com/amazingly-patient-artist-uses-100000-toothpicks-to-create-incredible-sculpture-of-san-francisco/">ART: Incredible Sculpture of San Francisco Made From 100,000 Toothpicks</a></strong></h3>
One talented (and incredibly patient) artist has worked on his painstakingly intricate tribute to <a href="https://inhabitat.com/sanfrancisco/">San Francisco</a> for the last 35 years, using 100,000 wooden toothpicks.

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<h3><strong><a href="https://inhabitat.com/researchers-develop-a-heat-pump-that-can-last-10000-years/">ENERGY: Researchers Develop a Heat Pump That Can Last 10,000 Years </a></strong></h3>
The average heat pump maintains an average useful life of 10-20 years, but researchers at the <a href="http://www.uis.no/frontpage/">University of Stavanger in Norway </a>(USN) and the <a href="http://www.uio.no/english/">University of Oslo</a> have developed a new heat pump that will last up to 10,000 years.

<h3><a href="https://inhabitat.com/365-knitting-clock-tells-the-time-by-spotted-at-milan-salone-satellite/">INTERIORS: 365 Knitting Clock Creates a New Scarf Each Year</a></h3>
This intriguing <a href="http://www.sirenelisewilhelmsen.com/sirenwilhelmsenknittingclock.html">365 Knitting Clock</a> turns traditional time telling on its head. The clock knits a 2 meter long scarf over the course of a year.

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<h3><strong><a href="https://inhabitat.com/the-best-sustainable-designs-from-salone-satellite-2011-in-milan/">FEATURED: Top Ten Green Designs from Salone Satellite 2011 in Milan</a></strong></h3>
The 14th edition of SaloneSatellite, “50+50 Projects – Designing the Future,” challenges its young designers to give us a sneak peek into the next 50 years of design.

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<h3><strong> <a href="https://inhabitat.com/nyc/brooklyn-grange-worlds-largest-rooftop-farm-kicks-off-second-growing-season/">LOCAL: Brooklyn Grange: The World’s Largest Rooftop Farm</a></strong></h3>
Located atop a six-story 1919 warehouse, the 40,000 square foot organic <a href="https://inhabitat.com/tag/rooftop-farm">rooftop farm</a> built by Bromley Caldari Architects is believe to be the largest of its kind in the world!